Probably the parts that have been around for decades.
As someone who's created open source software in the past, I'm put off mostly the explosion in software complexity over the last two decades, the constant churn in libraries and tooling which places an unreasonable maintenance burden on a spare-time hobbyist, and the bad taste left in the mouth by Microsoft using copilot to license-launder the github corpus.
I still produce open source software and gateware on a recreational basis, but in quiet little backwaters of the noosphere which aren't going to change the world (or be tainted by AI) any time soon!